Roland Reichwein f84d2e4af2 Add difference_type to span (#1503) ... Aligns with std. Generic code can depend on it. Co-authored-by: John Wellbelove <jwellbelove@users.noreply.github.com>		2026-07-16 10:10:00 +01:00
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etl	Add difference_type to span (#1503)	2026-07-16 10:10:00 +01:00